I've finally been able to contact with the previous designer working in the company and he's supplied the previously mentioned font but I can't open it or install it. It's in .as format... any clue of who to convert it to otf or something usable?

LET Smudger is a commercial font. You need to hold a license in order to use it.
Other designers may be able to provide you with fonts, but they can’t grant you the right to use them. And they most likely violate the EULA by passing on the fonts.

Andreas (Fontgrube) posted a link to one of the distributors where you can purchase a license (and get the necessary font files).
Read about the value of type.